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  ··Specification

Last update:
1st July 2000 		 
Electrical and mechanical IMS specifications relevant to a stand-alone retrofit unit.

These specifications may be subject to change due to improvements.

Measurement Inputs
  • 64 external analog voltage input connections.
  • Maximum differential input voltage between any two inputs ± 160V.
  • Internal voltage reference input with accuracy bettwer than 1% max.
  • Internal temperature sensor input with accuracy better than ± 1°C.
DC-coupled voltage measurement
  • Full-scale binary bipolar ranges from 40mV to 160V.
  • Input resistance 1Megohm.
  • Voltage accuracy better than 0.2% typical of full-scale.
  • Voltage accuracy temperature stability <10ppm/°C.
  • Linearity better than 0.03% typical.
  • Resolution better than 0.5mV (5V range), 2mV (20V range).
  • Common-mode rejection better than 85dB typical.
AC-coupled voltage measurement for impedance
  • 4 wire impedance measurement.
  • Frequency range from 10Hz to 1kHz.
  • 10 AC current injection outputs.
  • Impedance magnitude accuracy better than 0.5% typical of full-scale.
  • Impedance accuracy temperature stability <100ppm/°C.
  • Resolution better than 1uOhm (6mOhm range).
Data Storage
  • 10 year battery backed internal RAM.
Real Time Clock
  • Time accuracy better than 2 seconds per day at 25°C.
  • Time resolution 10 millisecond.
  • Y2K compliant
Power Supply
  • Supply voltage range ±9 to ±100V DC.
  • Power draw 1.5W normal mode, 4W during impedance measurement.
  • 200V isolation between supply input and other circuitry.
Display and Keypad
  • LCD type, 2 line x 20 character, alphanumeric, reflective display.
  • Displays parameters and data.
  • 4 key keypad can interrogate and manipulate stored data and user-defined parameters.
  • Piezo beeper to provide local warning of alarms.
I/O Port Communications (serial)
  • RS232, full duplex.
  • 1,200-19,200 baud, software selectable.
  • 1kV isolation to other circuitry and monitored inputs.
Mechanical
  • Aluminium housing.
  • Height 205mm (8.1 inches).
  • Width 125mm (4.9 inches).
  • Depth 60mm (2.4 inches).
  • Weight 800g (1.8 pound).
Connections
  • Voltage input: 68pin female SCSI III socket.
  • Impedance injection: 15pin female DB15 socket.
  • I/O Port: 9pin female DB9 socket.
Operating Environment
  • Operating temperature 0°C to 70°C.
  • Operating humidity to 95%, non condensing.
Accessories Included
  • Installation Manual.
  • Users Manual.
Options
  • Small industrial quality enclosure (IP55, NEMA 4).
  • I/O Port communications cable with custom end connector.
  • Voltage input cable with custom sense connectors.
  • Impedance injection cable with custom connectors.
  • Windows-based VisualBasic software for local or remote centalised access to provide data download, on-line surveillance, software upgrade and history interrogation.
  • RS485 host communications interface.
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